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DES 算法的 Javascript、PHP 及 Perl 的源代码

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下面这些源代码统统来自 tero.co.uk 网站。其中 包含了 JavaScript 实现按位工作的 DES （数据加密标准）加密算法。它支持 ECB（电子密码本(Electronic Code Book)）和 CBC（密码块链接(Cipher Block Chaining)），并且包含了 3DES 算法。它不需要任何附加库，并且同时提供了 PHP 和 Perl 的实现。

使用：

des(stringkey, stringmessage, booleanencrypt, [integermode, stringiv])

des 函数接受一个 8 字节字符串作为普通 DES 算法的密钥（也就是 64 位，但是算法只使用 56 位），或者接受一个 24 字节字符串作为 3DES 算法的密钥；第二个参数是要加密或解密的信息字符串；第三个布尔值参数用来说明信息是加密还是解密；接下来的可选参数 mode 如果是 0 表示 ECB 模式，1 表示 CBC 模式，默认是 ECB 模式；最后一个可选项是一个 8 字节的输入向量字符串（在 ECB 模式下不使用）。返回的密文是字符串。

下面是一些如何使用的例子。

// 使用 DES 算法（使用 8 字节的密钥）以 CBC 模式使用给出的输入向量加密信息

des("8bytekey", "This is the message.", 1, 1, "inputvec");

// 使用 3DES 算法（使用 24 字节的密钥） 以 ECB 模式加密信息

des("this is a 24 byte key !!", "This is the message.", 1);

//使用 ECB 模式的 DES 算法解密信息

des("8bytekey", "2384lf&*£90LSdsf", 0);

源码：

des.js

  1. //Javascript version
  2. //Paul Tero, July 2001
  3. //http://www.tero.co.uk/des/
  4. //
  5. //Optimised for performance with large blocks by Michael Hayworth, November 2001
  6. //http://www.netdealing.com
  7. //
  8. //THIS SOFTWARE IS PROVIDED "AS IS" AND
  9. //ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  10. //IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  11. //ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  12. //FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  13. //DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  14. //OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  15. //HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  16. //LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  17. //OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  18. //SUCH DAMAGE.
  19. //des
  20. //this takes the key, the message, and whether to encrypt or decrypt
  21. function des(key, message, encrypt, mode, iv){
  22. //declaring this locally speeds things up a bit
  23. var spfunction1 = newArray(0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004);
  24. var spfunction2 = newArray(-0x7fef7fe0,-0x7fff8000,0x8000,0x108020,0x100000,0x20,-0x7fefffe0,-0x7fff7fe0,-0x7fffffe0,-0x7fef7fe0,-0x7fef8000,-0x80000000,-0x7fff8000,0x100000,0x20,-0x7fefffe0,0x108000,0x100020,-0x7fff7fe0,0,-0x80000000,0x8000,0x108020,-0x7ff00000,0x100020,-0x7fffffe0,0,0x108000,0x8020,-0x7fef8000,-0x7ff00000,0x8020,0,0x108020,-0x7fefffe0,0x100000,-0x7fff7fe0,-0x7ff00000,-0x7fef8000,0x8000,-0x7ff00000,-0x7fff8000,0x20,-0x7fef7fe0,0x108020,0x20,0x8000,-0x80000000,0x8020,-0x7fef8000,0x100000,-0x7fffffe0,0x100020,-0x7fff7fe0,-0x7fffffe0,0x100020,0x108000,0,-0x7fff8000,0x8020,-0x80000000,-0x7fefffe0,-0x7fef7fe0,0x108000);
  25. var spfunction3 = newArray(0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200);
  26. var spfunction4 = newArray(0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);
  27. var spfunction5 = newArray(0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100);
  28. var spfunction6 = newArray(0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);
  29. var spfunction7 = newArray(0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002);
  30. var spfunction8 = newArray(0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);
  31. //create the 16 or 48 subkeys we will need
  32. var keys = des_createKeys(key);
  33. var m=0, i, j, temp, temp2, right1, right2, left, right, looping;
  34. var cbcleft, cbcleft2, cbcright, cbcright2
  35. var endloop, loopinc;
  36. var len = message.length;
  37. var chunk = 0;
  38. //set up the loops for single and triple des
  39. var iterations = keys.length == 32 ? 3 : 9; //single or triple des
  40. if (iterations == 3){looping = encrypt ? newArray(0, 32, 2) : newArray(30, -2, -2);}
  41. else {looping = encrypt ? newArray(0, 32, 2, 62, 30, -2, 64, 96, 2) : newArray(94, 62, -2, 32, 64, 2, 30, -2, -2);}
  42. message += "\0\0\0\0\0\0\0\0"; //pad the message out with null bytes
  43. //store the result here
  44. result = "";
  45. tempresult = "";
  46. if (mode == 1){//CBC mode
  47. cbcleft = (iv.charCodeAt(m++) << 24) | (iv.charCodeAt(m++) << 16) | (iv.charCodeAt(m++) << 8) | iv.charCodeAt(m++);
  48. cbcright = (iv.charCodeAt(m++) << 24) | (iv.charCodeAt(m++) << 16) | (iv.charCodeAt(m++) << 8) | iv.charCodeAt(m++);
  49. m=0;
  50. }
  51. //loop through each 64 bit chunk of the message
  52. while (m < len){
  53. left = (message.charCodeAt(m++) << 24) | (message.charCodeAt(m++) << 16) | (message.charCodeAt(m++) << 8) | message.charCodeAt(m++);
  54. right = (message.charCodeAt(m++) << 24) | (message.charCodeAt(m++) << 16) | (message.charCodeAt(m++) << 8) | message.charCodeAt(m++);
  55. //for Cipher Block Chaining mode, xor the message with the previous result
  56. if (mode == 1){if(encrypt){left ^= cbcleft; right ^= cbcright;}else{cbcleft2 = cbcleft; cbcright2 = cbcright; cbcleft = left; cbcright = right;}}
  57. //first each 64 but chunk of the message must be permuted according to IP
  58. temp = ((left >>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp << 4);
  59. temp = ((left >>> 16) ^ right) & 0x0000ffff; right ^= temp; left ^= (temp << 16);
  60. temp = ((right >>> 2) ^ left) & 0x33333333; left ^= temp; right ^= (temp << 2);
  61. temp = ((right >>> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp << 8);
  62. temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1);
  63. left = ((left << 1) | (left >>> 31));
  64. right = ((right << 1) | (right >>> 31));
  65. //do this either 1 or 3 times for each chunk of the message
  66. for (j=0; j<iterations; j+=3){
  67. endloop = looping[j+1];
  68. loopinc = looping[j+2];
  69. //now go through and perform the encryption or decryption
  70. for (i=looping[j]; i!=endloop; i+=loopinc){//for efficiency
  71. right1 = right ^ keys[i];
  72. right2 = ((right >>> 4) | (right << 28)) ^ keys[i+1];
  73. //the result is attained by passing these bytes through the S selection functions
  74. temp = left;
  75. left = right;
  76. right = temp ^ (spfunction2[(right1 >>> 24) & 0x3f] | spfunction4[(right1 >>> 16) & 0x3f]
  77. | spfunction6[(right1 >>> 8) & 0x3f] | spfunction8[right1 & 0x3f]
  78. | spfunction1[(right2 >>> 24) & 0x3f] | spfunction3[(right2 >>> 16) & 0x3f]
  79. | spfunction5[(right2 >>> 8) & 0x3f] | spfunction7[right2 & 0x3f]);
  80. }
  81. temp = left; left = right; right = temp; //unreverse left and right
  82. } //for either 1 or 3 iterations
  83. //move then each one bit to the right
  84. left = ((left >>> 1) | (left << 31));
  85. right = ((right >>> 1) | (right << 31));
  86. //now perform IP-1, which is IP in the opposite direction
  87. temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1);
  88. temp = ((right >>> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp << 8);
  89. temp = ((right >>> 2) ^ left) & 0x33333333; left ^= temp; right ^= (temp << 2);
  90. temp = ((left >>> 16) ^ right) & 0x0000ffff; right ^= temp; left ^= (temp << 16);
  91. temp = ((left >>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp << 4);
  92. //for Cipher Block Chaining mode, xor the message with the previous result
  93. if (mode == 1){if(encrypt){cbcleft = left; cbcright = right;}else{left ^= cbcleft2; right ^= cbcright2;}}
  94. tempresult += String.fromCharCode ((left>>>24), ((left>>>16) & 0xff), ((left>>>8) & 0xff), (left & 0xff), (right>>>24), ((right>>>16) & 0xff), ((right>>>8) & 0xff), (right & 0xff));
  95. chunk += 8;
  96. if (chunk == 512){result += tempresult; tempresult = ""; chunk = 0;}
  97. } //for every 8 characters, or 64 bits in the message
  98. //return the result as an array
  99. return result + tempresult;
  100. } //end of des
  101. //des_createKeys
  102. //this takes as input a 64 bit key (even though only 56 bits are used)
  103. //as an array of 2 integers, and returns 16 48 bit keys
  104. function des_createKeys(key){
  105. //declaring this locally speeds things up a bit
  106. pc2bytes0 = new Array(0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
  107. pc2bytes1 = new Array(0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
  108. pc2bytes2 = new Array(0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
  109. pc2bytes3 = new Array(0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
  110. pc2bytes4 = new Array(0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
  111. pc2bytes5 = new Array(0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
  112. pc2bytes6 = new Array(0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
  113. pc2bytes7 = new Array(0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
  114. pc2bytes8 = new Array(0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
  115. pc2bytes9 = new Array(0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
  116. pc2bytes10 = new Array(0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
  117. pc2bytes11 = new Array(0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
  118. pc2bytes12 = new Array(0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
  119. pc2bytes13 = new Array(0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105);
  120. //how many iterations (1 for des, 3 for triple des)
  121. var iterations = key.length >= 24 ? 3 : 1;
  122. //stores the return keys
  123. var keys = newArray(32 * iterations);
  124. //now define the left shifts which need to be done
  125. var shifts = newArray(0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
  126. //other variables
  127. var lefttemp, righttemp, m=0, n=0, temp;
  128. for (varj=0; j<iterations; j++){//either 1 or 3 iterations
  129. left = (key.charCodeAt(m++) << 24) | (key.charCodeAt(m++) << 16) | (key.charCodeAt(m++) << 8) | key.charCodeAt(m++);
  130. right = (key.charCodeAt(m++) << 24) | (key.charCodeAt(m++) << 16) | (key.charCodeAt(m++) << 8) | key.charCodeAt(m++);
  131. temp = ((left >>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp << 4);
  132. temp = ((right >>> -16) ^ left) & 0x0000ffff; left ^= temp; right ^= (temp << -16);
  133. temp = ((left >>> 2) ^ right) & 0x33333333; right ^= temp; left ^= (temp << 2);
  134. temp = ((right >>> -16) ^ left) & 0x0000ffff; left ^= temp; right ^= (temp << -16);
  135. temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1);
  136. temp = ((right >>> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp << 8);
  137. temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1);
  138. //the right side needs to be shifted and to get the last four bits of the left side
  139. temp = (left << 8) | ((right >>> 20) & 0x000000f0);
  140. //left needs to be put upside down
  141. left = (right << 24) | ((right << 8) & 0xff0000) | ((right >>> 8) & 0xff00) | ((right >>> 24) & 0xf0);
  142. right = temp;
  143. //now go through and perform these shifts on the left and right keys
  144. for (i=0; i < shifts.length; i++){
  145. //shift the keys either one or two bits to the left
  146. if (shifts[i]){left = (left << 2) | (left >>> 26); right = (right << 2) | (right >>> 26);}
  147. else {left = (left << 1) | (left >>> 27); right = (right << 1) | (right >>> 27);}
  148. left &= -0xf; right &= -0xf;
  149. //now apply PC-2, in such a way that E is easier when encrypting or decrypting
  150. //this conversion will look like PC-2 except only the last 6 bits of each byte are used
  151. //rather than 48 consecutive bits and the order of lines will be according to
  152. //how the S selection functions will be applied: S2, S4, S6, S8, S1, S3, S5, S7
  153. lefttemp = pc2bytes0[left >>> 28] | pc2bytes1[(left >>> 24) & 0xf]
  154. | pc2bytes2[(left >>> 20) & 0xf] | pc2bytes3[(left >>> 16) & 0xf]
  155. | pc2bytes4[(left >>> 12) & 0xf] | pc2bytes5[(left >>> 8) & 0xf]
  156. | pc2bytes6[(left >>> 4) & 0xf];
  157. righttemp = pc2bytes7[right >>> 28] | pc2bytes8[(right >>> 24) & 0xf]
  158. | pc2bytes9[(right >>> 20) & 0xf] | pc2bytes10[(right >>> 16) & 0xf]
  159. | pc2bytes11[(right >>> 12) & 0xf] | pc2bytes12[(right >>> 8) & 0xf]
  160. | pc2bytes13[(right >>> 4) & 0xf];
  161. temp = ((righttemp >>> 16) ^ lefttemp) & 0x0000ffff;
  162. keys[n++] = lefttemp ^ temp; keys[n++] = righttemp ^ (temp << 16);
  163. }
  164. } //for each iterations
  165. //return the keys we've created
  166. return keys;
  167. } //end of des_createKeys
  168. ////////////////////////////// TEST //////////////////////////////
  169. function stringToHex(s){
  170. var r = "0x";
  171. var hexes = newArray("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
  172. for (vari=0; i<s.length; i++){r += hexes[s.charCodeAt(i) >> 4] + hexes[s.charCodeAt(i) & 0xf];}
  173. return r;
  174. }
  175. var key = "this is a 24 byte key !!";
  176. var message = "This is a test message";
  177. var ciphertext = des(key, message, 1, 0);
  178. document.writeln ("DES Test: " + stringToHex(ciphertext));

des.php

  1. <?php
  2. //PHP version
  3. //Paul Tero, July 2001
  4. //http://www.tero.co.uk/des/
  5. //
  6. //Optimised for performance with large blocks by Michael Hayworth, November 2001
  7. //http://www.netdealing.com
  8. //
  9. //Converted from JavaScript to PHP by Jim Gibbs, June 2004
  10. //
  11. //THIS SOFTWARE IS PROVIDED "AS IS" AND
  12. //ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  13. //IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  14. //ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  15. //FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  16. //DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  17. //OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  18. //HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  19. //LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  20. //OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  21. //SUCH DAMAGE.
  22. //des
  23. //this takes the key, the message, and whether to encrypt or decrypt
  24. function des($key, $message, $encrypt, $mode, $iv){
  25. //declaring this locally speeds things up a bit
  26. $spfunction1 = array (0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004);
  27. $spfunction2 = array (-0x7fef7fe0,-0x7fff8000,0x8000,0x108020,0x100000,0x20,-0x7fefffe0,-0x7fff7fe0,-0x7fffffe0,-0x7fef7fe0,-0x7fef8000,-0x80000000,-0x7fff8000,0x100000,0x20,-0x7fefffe0,0x108000,0x100020,-0x7fff7fe0,0,-0x80000000,0x8000,0x108020,-0x7ff00000,0x100020,-0x7fffffe0,0,0x108000,0x8020,-0x7fef8000,-0x7ff00000,0x8020,0,0x108020,-0x7fefffe0,0x100000,-0x7fff7fe0,-0x7ff00000,-0x7fef8000,0x8000,-0x7ff00000,-0x7fff8000,0x20,-0x7fef7fe0,0x108020,0x20,0x8000,-0x80000000,0x8020,-0x7fef8000,0x100000,-0x7fffffe0,0x100020,-0x7fff7fe0,-0x7fffffe0,0x100020,0x108000,0,-0x7fff8000,0x8020,-0x80000000,-0x7fefffe0,-0x7fef7fe0,0x108000);
  28. $spfunction3 = array (0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200);
  29. $spfunction4 = array (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);
  30. $spfunction5 = array (0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100);
  31. $spfunction6 = array (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);
  32. $spfunction7 = array (0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002);
  33. $spfunction8 = array (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);
  34. $masks = array (4294967295,2147483647,1073741823,536870911,268435455,134217727,67108863,33554431,16777215,8388607,4194303,2097151,1048575,524287,262143,131071,65535,32767,16383,8191,4095,2047,1023,511,255,127,63,31,15,7,3,1,0);
  35. //create the 16 or 48 subkeys we will need
  36. $keys = des_createKeys ($key);
  37. $m=0;
  38. $len = strlen($message);
  39. $chunk = 0;
  40. //set up the loops for single and triple des
  41. $iterations = ((count($keys) == 32) ? 3 : 9); //single or triple des
  42. if ($iterations == 3){$looping = (($encrypt) ? array(0, 32, 2) : array(30, -2, -2));}
  43. else {$looping = (($encrypt) ? array(0, 32, 2, 62, 30, -2, 64, 96, 2) : array(94, 62, -2, 32, 64, 2, 30, -2, -2));}
  44. $message .= (chr(0) . chr(0) . chr(0) . chr(0) . chr(0) . chr(0) . chr(0) . chr(0)); //pad the message out with null bytes
  45. //store the result here
  46. $result = "";
  47. $tempresult = "";
  48. if ($mode == 1){//CBC mode
  49. $cbcleft = (ord($iv{$m++}) << 24) | (ord($iv{$m++}) << 16) | (ord($iv{$m++}) << 8) | ord($iv{$m++});
  50. $cbcright = (ord($iv{$m++}) << 24) | (ord($iv{$m++}) << 16) | (ord($iv{$m++}) << 8) | ord($iv{$m++});
  51. $m=0;
  52. }
  53. //loop through each 64 bit chunk of the message
  54. while ($m < $len){
  55. $left = (ord($message{$m++}) << 24) | (ord($message{$m++}) << 16) | (ord($message{$m++}) << 8) | ord($message{$m++});
  56. $right = (ord($message{$m++}) << 24) | (ord($message{$m++}) << 16) | (ord($message{$m++}) << 8) | ord($message{$m++});
  57. //for Cipher Block Chaining mode, xor the message with the previous result
  58. if ($mode == 1){if($encrypt){$left ^= $cbcleft; $right ^= $cbcright;}else{$cbcleft2 = $cbcleft; $cbcright2 = $cbcright; $cbcleft = $left; $cbcright = $right;}}
  59. //first each 64 but chunk of the message must be permuted according to IP
  60. $temp = (($left >> 4 & $masks[4]) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
  61. $temp = (($left >> 16 & $masks[16]) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
  62. $temp = (($right >> 2 & $masks[2]) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
  63. $temp = (($right >> 8 & $masks[8]) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
  64. $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  65. $left = (($left << 1) | ($left >> 31 & $masks[31]));
  66. $right = (($right << 1) | ($right >> 31 & $masks[31]));
  67. //do this either 1 or 3 times for each chunk of the message
  68. for ($j=0; $j<$iterations; $j+=3){
  69. $endloop = $looping[$j+1];
  70. $loopinc = $looping[$j+2];
  71. //now go through and perform the encryption or decryption
  72. for ($i=$looping[$j]; $i!=$endloop; $i+=$loopinc){//for efficiency
  73. $right1 = $right ^ $keys[$i];
  74. $right2 = (($right >> 4 & $masks[4]) | ($right << 28)) ^ $keys[$i+1];
  75. //the result is attained by passing these bytes through the S selection functions
  76. $temp = $left;
  77. $left = $right;
  78. $right = $temp ^ ($spfunction2[($right1 >> 24 & $masks[24]) & 0x3f] | $spfunction4[($right1 >> 16 & $masks[16]) & 0x3f]
  79. | $spfunction6[($right1 >> 8 & $masks[8]) & 0x3f] | $spfunction8[$right1 & 0x3f]
  80. | $spfunction1[($right2 >> 24 & $masks[24]) & 0x3f] | $spfunction3[($right2 >> 16 & $masks[16]) & 0x3f]
  81. | $spfunction5[($right2 >> 8 & $masks[8]) & 0x3f] | $spfunction7[$right2 & 0x3f]);
  82. }
  83. $temp = $left; $left = $right; $right = $temp; //unreverse left and right
  84. } //for either 1 or 3 iterations
  85. //move then each one bit to the right
  86. $left = (($left >> 1 & $masks[1]) | ($left << 31));
  87. $right = (($right >> 1 & $masks[1]) | ($right << 31));
  88. //now perform IP-1, which is IP in the opposite direction
  89. $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  90. $temp = (($right >> 8 & $masks[8]) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
  91. $temp = (($right >> 2 & $masks[2]) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
  92. $temp = (($left >> 16 & $masks[16]) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
  93. $temp = (($left >> 4 & $masks[4]) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
  94. //for Cipher Block Chaining mode, xor the message with the previous result
  95. if ($mode == 1){if($encrypt){$cbcleft = $left; $cbcright = $right;}else{$left ^= $cbcleft2; $right ^= $cbcright2;}}
  96. $tempresult .= (chr($left>>24 & $masks[24]) . chr(($left>>16 & $masks[16]) & 0xff) . chr(($left>>8 & $masks[8]) & 0xff) . chr($left & 0xff) . chr($right>>24 & $masks[24]) . chr(($right>>16 & $masks[16]) & 0xff) . chr(($right>>8 & $masks[8]) & 0xff) . chr($right & 0xff));
  97. $chunk += 8;
  98. if ($chunk == 512){$result .= $tempresult; $tempresult = ""; $chunk = 0;}
  99. } //for every 8 characters, or 64 bits in the message
  100. //return the result as an array
  101. return ($result . $tempresult);
  102. } //end of des
  103. //des_createKeys
  104. //this takes as input a 64 bit key (even though only 56 bits are used)
  105. //as an array of 2 integers, and returns 16 48 bit keys
  106. function des_createKeys($key){
  107. //declaring this locally speeds things up a bit
  108. $pc2bytes0 = array (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
  109. $pc2bytes1 = array (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
  110. $pc2bytes2 = array (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
  111. $pc2bytes3 = array (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
  112. $pc2bytes4 = array (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
  113. $pc2bytes5 = array (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
  114. $pc2bytes6 = array (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
  115. $pc2bytes7 = array (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
  116. $pc2bytes8 = array (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
  117. $pc2bytes9 = array (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
  118. $pc2bytes10 = array (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
  119. $pc2bytes11 = array (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
  120. $pc2bytes12 = array (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
  121. $pc2bytes13 = array (0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105);
  122. $masks = array (4294967295,2147483647,1073741823,536870911,268435455,134217727,67108863,33554431,16777215,8388607,4194303,2097151,1048575,524287,262143,131071,65535,32767,16383,8191,4095,2047,1023,511,255,127,63,31,15,7,3,1,0);
  123. //how many iterations (1 for des, 3 for triple des)
  124. $iterations = ((strlen($key) >= 24) ? 3 : 1);
  125. //stores the return keys
  126. $keys = array (); // size = 32 * iterations but you don't specify this in php
  127. //now define the left shifts which need to be done
  128. $shifts = array (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
  129. //other variables
  130. $m=0;
  131. $n=0;
  132. for ($j=0; $j<$iterations; $j++){//either 1 or 3 iterations
  133. $left = (ord($key{$m++}) << 24) | (ord($key{$m++}) << 16) | (ord($key{$m++}) << 8) | ord($key{$m++});
  134. $right = (ord($key{$m++}) << 24) | (ord($key{$m++}) << 16) | (ord($key{$m++}) << 8) | ord($key{$m++});
  135. $temp = (($left >> 4 & $masks[4]) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
  136. $temp = (($right >> 16 & $masks[16]) ^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << -16);
  137. $temp = (($left >> 2 & $masks[2]) ^ $right) & 0x33333333; $right ^= $temp; $left ^= ($temp << 2);
  138. $temp = (($right >> 16 & $masks[16]) ^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << -16);
  139. $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  140. $temp = (($right >> 8 & $masks[8]) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
  141. $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  142. //the right side needs to be shifted and to get the last four bits of the left side
  143. $temp = ($left << 8) | (($right >> 20 & $masks[20]) & 0x000000f0);
  144. //left needs to be put upside down
  145. $left = ($right << 24) | (($right << 8) & 0xff0000) | (($right >> 8 & $masks[8]) & 0xff00) | (($right >> 24 & $masks[24]) & 0xf0);
  146. $right = $temp;
  147. //now go through and perform these shifts on the left and right keys
  148. for ($i=0; $i < count($shifts); $i++){
  149. //shift the keys either one or two bits to the left
  150. if ($shifts[$i] > 0){
  151. $left = (($left << 2) | ($left >> 26 & $masks[26]));
  152. $right = (($right << 2) | ($right >> 26 & $masks[26]));
  153. } else{
  154. $left = (($left << 1) | ($left >> 27 & $masks[27]));
  155. $right = (($right << 1) | ($right >> 27 & $masks[27]));
  156. }
  157. $left = $left & -0xf;
  158. $right = $right & -0xf;
  159. //now apply PC-2, in such a way that E is easier when encrypting or decrypting
  160. //this conversion will look like PC-2 except only the last 6 bits of each byte are used
  161. //rather than 48 consecutive bits and the order of lines will be according to
  162. //how the S selection functions will be applied: S2, S4, S6, S8, S1, S3, S5, S7
  163. $lefttemp = $pc2bytes0[$left >> 28 & $masks[28]] | $pc2bytes1[($left >> 24 & $masks[24]) & 0xf]
  164. | $pc2bytes2[($left >> 20 & $masks[20]) & 0xf] | $pc2bytes3[($left >> 16 & $masks[16]) & 0xf]
  165. | $pc2bytes4[($left >> 12 & $masks[12]) & 0xf] | $pc2bytes5[($left >> 8 & $masks[8]) & 0xf]
  166. | $pc2bytes6[($left >> 4 & $masks[4]) & 0xf];
  167. $righttemp = $pc2bytes7[$right >> 28 & $masks[28]] | $pc2bytes8[($right >> 24 & $masks[24]) & 0xf]
  168. | $pc2bytes9[($right >> 20 & $masks[20]) & 0xf] | $pc2bytes10[($right >> 16 & $masks[16]) & 0xf]
  169. | $pc2bytes11[($right >> 12 & $masks[12]) & 0xf] | $pc2bytes12[($right >> 8 & $masks[8]) & 0xf]
  170. | $pc2bytes13[($right >> 4 & $masks[4]) & 0xf];
  171. $temp = (($righttemp >> 16 & $masks[16]) ^ $lefttemp) & 0x0000ffff;
  172. $keys[$n++] = $lefttemp ^ $temp; $keys[$n++] = $righttemp ^ ($temp << 16);
  173. }
  174. } //for each iterations
  175. //return the keys we've created
  176. return $keys;
  177. } //end of des_createKeys
  178. ////////////////////////////// TEST //////////////////////////////
  179. function stringToHex($s){
  180. $r = "0x";
  181. $hexes = array ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
  182. for ($i=0; $i<strlen($s); $i++){$r .= ($hexes[(ord($s{$i}) >> 4)] . $hexes[(ord($s{$i}) & 0xf)]);}
  183. return $r;
  184. }
  185. echo "<PRE>";
  186. $key = "this is a 24 byte key !!";
  187. $message = "This is a test message";
  188. $ciphertext = des ($key, $message, 1, 0, null);
  189. echo "DES Test Encrypted: " . stringToHex($ciphertext);
  190. $recovered_message = des ($key, $ciphertext, 0, 0, null);
  191. echo "\n";
  192. echo "DES Test Decrypted: " . $recovered_message;
  193. ?>

des.pl

  1. #!/usr/bin/perl
  2. #Perl version
  3. #Paul Tero, July 2001
  4. #http://www.tero.co.uk/des/
  5. #
  6. #Converted from JavaScript to Perl by Chris Drake, July 2002
  7. #
  8. #Optimised for performance with large blocks by Michael Hayworth, November 2001
  9. #http://www.netdealing.com
  10. #
  11. #THIS SOFTWARE IS PROVIDED "AS IS" AND
  12. #ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  13. #IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  14. #ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  15. #FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  16. #DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  17. #OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  18. #HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  19. #LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  20. #OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  21. #SUCH DAMAGE.
  22. use strict;
  23. #des
  24. #this takes the key, the message, and whether to encrypt or decrypt
  25. sub TripleDES{
  26. my($key, $message, $encrypt, $mode, $iv)=@_;
  27. # declaring this locally speeds things up a bit
  28. my @spfunction1 = (0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004);
  29. my @spfunction2 = (0x80108020,0x80008000,0x8000,0x108020,0x100000,0x20,0x80100020,0x80008020,0x80000020,0x80108020,0x80108000,0x80000000,0x80008000,0x100000,0x20,0x80100020,0x108000,0x100020,0x80008020,0,0x80000000,0x8000,0x108020,0x80100000,0x100020,0x80000020,0,0x108000,0x8020,0x80108000,0x80100000,0x8020,0,0x108020,0x80100020,0x100000,0x80008020,0x80100000,0x80108000,0x8000,0x80100000,0x80008000,0x20,0x80108020,0x108020,0x20,0x8000,0x80000000,0x8020,0x80108000,0x100000,0x80000020,0x100020,0x80008020,0x80000020,0x100020,0x108000,0,0x80008000,0x8020,0x80000000,0x80100020,0x80108020,0x108000);
  30. my @spfunction3 = (0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200);
  31. my @spfunction4 = (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);
  32. my @spfunction5 = (0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100);
  33. my @spfunction6 = (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);
  34. my @spfunction7 = (0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002);
  35. my @spfunction8 = (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);
  36. #create the 16 or 48 subkeys we will need
  37. my @keys = &des_createKeys($key);
  38. my ($m, $i, $j, $temp, $temp2, $right1, $right2, $left, $right, @looping)=(0);
  39. my ($cbcleft, $cbcleft2, $cbcright, $cbcright2);
  40. my ($endloop, $loopinc, $result, $tempresult);
  41. my $len = length($message);
  42. my $chunk = 0;
  43. #set up the loops for single and triple des
  44. my $iterations = $#keys == 32 ? 3 : 9; #single or triple des
  45. if ($iterations == 3){@looping = $encrypt ? (0, 32, 2) : (30, -2, -2);}
  46. else {@looping = $encrypt ? (0, 32, 2, 62, 30, -2, 64, 96, 2) : (94, 62, -2, 32, 64, 2, 30, -2, -2);}
  47. $message .= "\0\0\0\0\0\0\0\0"; #pad the message out with null bytes
  48. #store the result here
  49. $result = "";
  50. $tempresult = "";
  51. if ($mode == 1){#CBC mode
  52. $cbcleft = (unpack("C",substr($iv,$m++,1)) << 24) | (unpack("C",substr($iv,$m++,1)) << 16) | (unpack("C",substr($iv,$m++,1)) << 8) | unpack("C",substr($iv,$m++,1));
  53. $cbcright = (unpack("C",substr($iv,$m++,1)) << 24) | (unpack("C",substr($iv,$m++,1)) << 16) | (unpack("C",substr($iv,$m++,1)) << 8) | unpack("C",substr($iv,$m++,1));
  54. $m=0;
  55. }
  56. #loop through each 64 bit chunk of the message
  57. while ($m < $len){
  58. $left = (unpack("C",substr($message,$m++,1)) << 24) | (unpack("C",substr($message,$m++,1)) << 16) | (unpack("C",substr($message,$m++,1)) << 8) | unpack("C",substr($message,$m++,1));
  59. $right = (unpack("C",substr($message,$m++,1)) << 24) | (unpack("C",substr($message,$m++,1)) << 16) | (unpack("C",substr($message,$m++,1)) << 8) | unpack("C",substr($message,$m++,1));
  60. #for Cipher Block Chaining mode, xor the message with the previous result
  61. if ($mode == 1){if($encrypt){$left ^= $cbcleft; $right ^= $cbcright;}else{$cbcleft2 = $cbcleft; $cbcright2 = $cbcright; $cbcleft = $left; $cbcright = $right;}}
  62. #first each 64 but chunk of the message must be permuted according to IP
  63. $temp = (($left >> 4) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
  64. $temp = (($left >> 16) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
  65. $temp = (($right >> 2) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
  66. $temp = (($right >> 8) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
  67. $temp = (($left >> 1) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  68. $left = (($left << 1) | ($left >> 31));
  69. $right = (($right << 1) | ($right >> 31));
  70. #do this either 1 or 3 times for each chunk of the message
  71. for ($j=0; $j<$iterations; $j+=3){
  72. $endloop =$looping[$j+1]; $loopinc =$looping[$j+2]; #now go through and perform the encryption or decryption
  73. for ($i=$looping[$j]; $i!=$endloop; $i+=$loopinc){#for efficiency
  74. $right1 =$right ^ $keys[$i];
  75. $right2 =(($right >> 4) | ($right << 28)) ^ $keys[$i+1];
  76. #the result is attained by passing these bytes through the S selection functions
  77. $temp = $left;
  78. $left = $right;
  79. $right = $temp ^ ($spfunction2[($right1 >> 24) & 0x3f] | $spfunction4[($right1 >> 16) & 0x3f]
  80. | $spfunction6[($right1 >> 8) & 0x3f] | $spfunction8[$right1 & 0x3f]
  81. | $spfunction1[($right2 >> 24) & 0x3f] | $spfunction3[($right2 >> 16) & 0x3f]
  82. | $spfunction5[($right2 >> 8) & 0x3f] | $spfunction7[$right2 & 0x3f]);
  83. }
  84. $temp = $left; $left = $right; $right = $temp; #unreverse left and right
  85. } #for either 1 or 3 iterations
  86. #move then each one bit to the right
  87. $left = (($left >> 1) | ($left << 31));
  88. $right = (($right >> 1) | ($right << 31));
  89. #now perform IP-1, which is IP in the opposite direction
  90. $temp = (($left >> 1) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  91. $temp = (($right >> 8) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
  92. $temp = (($right >> 2) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
  93. $temp = (($left >> 16) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
  94. $temp = (($left >> 4) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
  95. #for Cipher Block Chaining mode, xor the message with the previous result
  96. if ($mode == 1){if($encrypt){$cbcleft = $left; $cbcright = $right;}else{$left ^= $cbcleft2; $right ^= $cbcright2;}}
  97. $tempresult .= pack("C*", (($left>>24), (($left>>16) & 0xff), (($left>>8) & 0xff), ($left & 0xff), ($right>>24), (($right>>16) & 0xff), (($right>>8) & 0xff), ($right & 0xff)));
  98. $chunk += 8;
  99. if ($chunk == 512){$result .= $tempresult; $tempresult = ""; $chunk = 0;}
  100. } #for every 8 characters, or 64 bits in the message
  101. #return the result as an array
  102. return $result . $tempresult;
  103. } #end of des
  104. #des_createKeys
  105. #this takes as input a 64 bit key (even though only 56 bits are used)
  106. #as an array of 2 integers, and returns 16 48 bit keys
  107. sub des_createKeys{
  108. use integer;
  109. my($key)=@_;
  110. #declaring this locally speeds things up a bit
  111. my @pc2bytes0 = (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
  112. my @pc2bytes1 = (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
  113. my @pc2bytes2 = (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
  114. my @pc2bytes3 = (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
  115. my @pc2bytes4 = (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
  116. my @pc2bytes5 = (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
  117. my @pc2bytes6 = (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
  118. my @pc2bytes7 = (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
  119. my @pc2bytes8 = (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
  120. my @pc2bytes9 = (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
  121. my @pc2bytes10 = (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
  122. my @pc2bytes11 = (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
  123. my @pc2bytes12 = (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
  124. my @pc2bytes13 = (0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105);
  125. #how many iterations (1 for des, 3 for triple des)
  126. my $iterations = length($key) >= 24 ? 3 : 1;
  127. #stores the return keys
  128. my @keys; $#keys=(32 * $iterations);
  129. #now define the left shifts which need to be done
  130. my @shifts = (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
  131. #other variables
  132. my ($m, $n, $lefttemp, $righttemp, $left, $right, $temp)=(0,0);
  133. for (my$j=0; $j<$iterations; $j++){#either 1 or 3 iterations
  134. $left =(unpack("C",substr($key,$m++,1)) << 24) | (unpack("C",substr($key,$m++,1)) << 16) | (unpack("C",substr($key,$m++,1)) << 8) | unpack("C",substr($key,$m++,1));
  135. $right = (unpack("C",substr($key,$m++,1)) << 24) | (unpack("C",substr($key,$m++,1)) << 16) | (unpack("C",substr($key,$m++,1)) << 8) | unpack("C",substr($key,$m++,1));
  136. $temp = (($left >> 4) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
  137. $temp = (($right >> 16)^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << 16);
  138. $temp = (($left >> 2) ^ $right) & 0x33333333; $right ^= $temp; $left ^= ($temp << 2);
  139. $temp = (($right >> 16)^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << 16);
  140. $temp = (($left >> 1) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  141. $temp = (($right >> 8) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
  142. $temp = (($left >> 1) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
  143. #the right side needs to be shifted and to get the last four bits of the left side
  144. $temp = ($left << 8) | (($right >> 20) & 0x000000f0);
  145. #left needs to be put upside down
  146. $left = ($right << 24) | (($right << 8) & 0xff0000) | (($right >> 8) & 0xff00) | (($right >> 24) & 0xf0);
  147. $right = $temp;
  148. #now go through and perform these shifts on the left and right keys
  149. for (my$i=0; $i <= $#shifts; $i++){
  150. #shift the keys either one or two bits to the left
  151. if ($shifts[$i]){
  152. no integer;
  153. $left = ($left << 2) | ($left >> 26);
  154. $right = ($right << 2) | ($right >> 26);
  155. use integer;
  156. $left<<=0;$right<<=0;
  157. } else{
  158. no integer;
  159. $left = ($left << 1) | ($left >> 27);
  160. $right = ($right << 1) | ($right >> 27);
  161. use integer;
  162. $left<<=0;$right<<=0;
  163. }
  164. $left &= 0xfffffff0; $right &= 0xfffffff0;
  165. #now apply PC-2, in such a way that E is easier when encrypting or decrypting
  166. #this conversion will look like PC-2 except only the last 6 bits of each byte are used
  167. #rather than 48 consecutive bits and the order of lines will be according to
  168. #how the S selection functions will be applied: S2, S4, S6, S8, S1, S3, S5, S7
  169. $lefttemp = $pc2bytes0[$left >> 28] | $pc2bytes1[($left >> 24) & 0xf]
  170. | $pc2bytes2[($left >> 20) & 0xf] | $pc2bytes3[($left >> 16) & 0xf]
  171. | $pc2bytes4[($left >> 12) & 0xf] | $pc2bytes5[($left >> 8) & 0xf]
  172. | $pc2bytes6[($left >> 4) & 0xf];
  173. $righttemp = $pc2bytes7[$right >> 28] | $pc2bytes8[($right >> 24) & 0xf]
  174. | $pc2bytes9[($right >> 20) & 0xf] | $pc2bytes10[($right >> 16) & 0xf]
  175. | $pc2bytes11[($right >> 12) & 0xf] | $pc2bytes12[($right >> 8) & 0xf]
  176. | $pc2bytes13[($right >> 4) & 0xf];
  177. $temp = (($righttemp >> 16) ^ $lefttemp) & 0x0000ffff;
  178. $keys[$n++] = $lefttemp ^ $temp; $keys[$n++] = $righttemp ^ ($temp << 16);
  179. }
  180. } #for each iterations
  181. #return the keys we've created
  182. return @keys;
  183. } #end of des_createKeys
  184. #//////////////////////////// TEST //////////////////////////////
  185. #printHexArray
  186. sub printHex{
  187. my($s)=@_;
  188. my $r = "0x";
  189. my @hexes=("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
  190. for (my$i=0; $i<length($s); $i++){$r.=$hexes[unpack("C",substr($s,$i,1)) >> 4] . $hexes[unpack("C",substr($s,$i,1)) & 0xf];}
  191. return $r;
  192. }
  193. print "3DES in perl\n";
  194. my $K="this is a 24 byte key !!";
  195. my $msg="This is a test message";
  196. my $ciphertext=&TripleDES($K,$msg,1,0);
  197. print "DES Test: " . &printHex($ciphertext) . "\n";
  198. my $plaintext=&TripleDES($K,$ciphertext,0,0);
  199. print "DES Test: " . $plaintext . "\n";
  200. exit(0);

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